Physiological processes limiting plant productivity / by C.B. Johnson. Johnson, C.B. Plant physiology Congresses. Plants, Cultivated Physiology Congresses. Primary productivity (Biology) Congresses. QK710.2 .P49 1981 631.54 19 JOP Includes bibliographical references and index. London ; Boston : Butterworths, 1981. 1981. 1981 Text 395 p. : eng